Question 53993
2X+Y+2Z=7
2X-Y+2Z=1 A BETTER MOVE HERE IS TO SUBTRACT THE SECOND EQUATION FROM THE FIRST
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2Y=6 OR Y=6/2 OR Y=3 2X+3+2Z=7 OR 2X+2Z=4 & 2X-3+2Z=1 OR 2X+2Z=4 OR X+Z=2

THEN X & Z  CAN EQUAL 1 & 1 OR X & Z CAN EQUAL 3 & -1 OR X & Z CAN EQUAL 
4 & -2 OR ANY OTHER COMBINATION THAT=2